threadprevnexlistaction.java

JiveJdon 3.0 is the application of Jdon Framework 1.4 final.

/*
 * Copyright 2003-2005 the original author or authors.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */
package com.jdon.jivejdon.presentation.action;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import com.jdon.controller.WebAppUtil;
import com.jdon.jivejdon.service.ForumMessageService;
import com.jdon.strutsutil.FormBeanUtil;
import com.jdon.util.UtilValidate;
import com.jdon.util.Debug;

/**
 * @author <a href="mailto:[e-mail]">banq </a>
 *  
 */
public class ThreadPrevNexListAction extends Action {
    private final static String module = ThreadPrevNexListAction.class.getName();

    public ActionForward execute(ActionMapping actionMapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response)
            throws Exception {

        ForumMessageService forumMessageService = (ForumMessageService) WebAppUtil.getService("forumMessageService", request);
        String currentThreadId = request.getParameter("threadId");
        String forumId = request.getParameter("forumId");
        if ((UtilValidate.isEmpty(currentThreadId)) || (UtilValidate.isEmpty(forumId))) {
            Debug.logError("require the paramters : currentThreadId or forumId ");
            actionMapping.findForward(FormBeanUtil.FORWARD_SUCCESS_NAME);
        }
        try {
            Long currentThreadIdL = new Long(currentThreadId);
            List resultIds = forumMessageService.getThreadsPrevNext(new Long(forumId), currentThreadIdL);
            
            int index = resultIds.indexOf(currentThreadIdL);
            Debug.logVerbose(" found the block ,size:" + resultIds.size() + " the index=" + index, module);

            //transfer the forumThread from threadId Collection from the resultIds;
            List threads = new ArrayList();
            Iterator iter = resultIds.iterator();
            while (iter.hasNext()) {
                Long id = (Long) iter.next();
                threads.add(forumMessageService.getThread(id));
            }
            ListIterator li = threads.listIterator();
            Debug.logVerbose(" locate currentThreadId:" + currentThreadId , module);
            while (li.nextIndex() != index) {                
                Object o = li.next();                
            }
            request.setAttribute("ThreadsPrevNext", li); //for above
            
            ListIterator li2 = threads.listIterator();
            Debug.logVerbose(" locate currentThreadId:" + currentThreadId, module);
            while (li2.nextIndex() != index) {                
                Object o = li2.next();                
            }
            request.setAttribute("ThreadsPrevNext2", li2);// for below
            
        } catch (Exception e) {
            Debug.logError(e, module);
        }
        return actionMapping.findForward(FormBeanUtil.FORWARD_SUCCESS_NAME);
    }

}